Denim trends? Why? Where? WHY?

Living in this heat where the temperature is now crossing over to 47°C followed by dust storms and if lucky t-storms, where humidity level will only increase as monsoon begins, who in their right mind thinks denim is a trend in the subcontinent? We can barely tolerate cotton, we're going for mul cotton and lawn and even they need to be balloony as we can't even tolerate that on our skin vloggers are doing denim hauls??? Especially Indian vloggers. And they actually say they're not feeling hot? What denim is it?